Unverified Commit 0a9f2a61 authored by Andreas Schwab's avatar Andreas Schwab Committed by Palmer Dabbelt
Browse files

riscv: add Linux note to vdso 



The Linux note in the vdso allows glibc to check the running kernel
version without having to issue the uname syscall.

Signed-off-by: default avatarAndreas Schwab <schwab@suse.de>
Signed-off-by: default avatarPalmer Dabbelt <palmerdabbelt@google.com>
parent c749bb2d

arch/riscv/kernel/vdso/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -12,7 +12,7 @@ vdso-syms += getcpu 
vdso-syms += flush_icache



# Files to link into the vdso

obj-vdso = $(patsubst %, %.o, $(vdso-syms))

obj-vdso = $(patsubst %, %.o, $(vdso-syms)) note.o



# Build rules

targets := $(obj-vdso) vdso.so vdso.so.dbg vdso.lds vdso-dummy.o

arch/riscv/kernel/vdso/note.S

0 → 100644
+12 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0-or-later */

/*

 * This supplies .note.* sections to go into the PT_NOTE inside the vDSO text.

 * Here we can supply some information useful to userland.

 */



#include <linux/elfnote.h>

#include <linux/version.h>



ELFNOTE_START(Linux, 0, "a")

	.long LINUX_VERSION_CODE

ELFNOTE_END

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